Calculate

Class(es)
Artificer
Sorcerer
Warlock
Wizard
Casting Time
1 Action
Range
Self
Components:
Duration:
Concentration ( 1 hour )

You instantly know the answer to any mathematical equation that you speak aloud. The equation must be a problem that a creature with Intelligence 20 could solve using nonmagical tools with 1 hour of calculation. Additionally, you gain an expertise die on Engineering checks made during the duration of the spell.

Note: Using the calculate cantrip allows a player to make use of a calculator at the table in order to rapidly answer mathematical equations.

Source
Adventurer's Guide

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